If you have been sedentary and decide to start walking one mile a day, the added exercise could burn an extra 100 calories daily.
如果你惯于久坐不动,并决定开始每天步行一英里,这样你每天会额外消耗100卡热量。
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These molecules burn more cleanly than gasoline, in part because they have fewer, if any, carbon-carbon bonds, and the hydrocarbons they do emit are less likely to generate ozone.